Answer:
1.) A decrease in the population of the animals in the trophic level above it.
2.) It will decrease the population of the animals in the trophic levels below it.
Step-by-step explanation:
The population would increase if the predator of toucans decreased. This would mean less toucans would die so you would see an increase in their population as they could reproduce more. It will decrease the population of the tropic levels below because an influx of toucans would be more than the other levels could handle.